Container locking

The device (10) has a container lock housing (100) and a locking hook (110) that has a hook portion, and a hook element. The locking hook is stationary relative to housing and swivels into standby position and locking position about pivot axis. An actuator device is provided for locking hook, and has upper and lower actuating elements and a releasing mechanism that acts on upper actuating element and/or on lower actuating element after release, and automatically brings about clamping and blocking of locking hook in locking position by lower actuating element. An independent claim is included for an arrangement of locking device.